Exam 1: Defining and Collecting Data

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the United States a series of questions to find out their view on the U.S.economy. -Referring to Table 1-2,the possible responses to the question "How many people in your household are unemployed currently?" result in

The universe or "totality of items or things" under consideration is called

A study is under way in Yosemite National Forest to determine the adult height of American pine trees.Specifically,the study is attempting to determine what factors aid a tree in reaching heights greater than 60 feet tall.It is estimated that the forest contains 25,000 adult American pines.The study involves collecting heights from 250 randomly selected adult American pine trees and analyzing the results.Identify the sample in the study.

The sampling process begins by locating appropriate data sources called ________.

True or False: The brand of TV one owns is an example of a numerical variable.

TABLE 1-1 The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a Blu-ray player made by the company over the past 12 months are satisfied with their products. -True or False: The possible responses to the question "How many times in the past three months have you visited a city park?" are values from a discrete variable.

The Dean of Students conducted a survey on campus.Class designation (Freshman,Sophomore,Junior,Senior)is an example of a ________ variable.

Which of the following yields a simple random sample?

The portion of the universe that has been selected for analysis is called

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the United States a series of questions to find out their view on the U.S.economy. -Referring to Table 1-2,the possible responses to the question "Are you 1.Currently employed, 2.Unemployed but actively looking for job,3.Unemployed and quit looking for job?" are values from a

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the United States a series of questions to find out their view on the U.S.economy. -Referring to Table 1-2,the possible responses to the question "How many out of every 10 U.S.voters do you think feel that the U.S.economy is in good shape?" result in

TABLE 1-3 The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a Blu-ray player made by the company over the past 12 months are satisfied with their products. -Referring to Table 1-3,which of the following questions in the survey will not likely induce a measurement error?

A study is under way in Yosemite National Forest to determine the adult height of American pine trees.Specifically,the study is attempting to determine what factors aid a tree in reaching heights greater than 60 feet tall.It is estimated that the forest contains 25,000 adult American pines.The study involves collecting heights from 250 randomly selected adult American pine trees and analyzing the results.Identify the population from which the study was sampled.

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the United States a series of questions to find out their view on the U.S.economy. -Referring to Table 1-2,the possible responses to the question "How many more months do you think the U.S.economy will require to get out of a recession?" are values from a

True or False: Sampling error can be reduced by taking larger sample sizes.

TABLE 1-1 The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a Blu-ray player made by the company over the past 12 months are satisfied with their products. -True or False: The answer to the question "How many hours on average do you spend watching TV every week?" is an example of a ratio scaled variable.

True or False: In a business statistics class students sit randomly without particular preferences.A sample is selected by including everybody who sits in the first row.This is an example of a cluster sample.

Which of the following yields a systematic sample?

The Dean of Students conducted a survey on campus.The gender of the student is an example of a ________ variable.

Which of the following sampling methods is a probability sample?